This seems to still fail when there is only one "used" trait and the method name is unqualified:
-------
trait Foo{
use Bar {
get as protected getter;
set as protected setter;
delete as protected unsetter;
exists as protected issetter;
}
}
-------

I don't think this is completely solved. Using the 1.5.0RC3 release, I still see:
ERROR | Constants must be uppercase; expected _CONFIG but found _config
For code like:
class Foo {
use BarTrait;
use FirstTrait {
config as protected _config;
}
}